Toilet stool



FIG. 1 is a front, top and right-side perspective view of a toilet stool showing our new design;

FIG. 2 is a front view thereof;

FIG. 3 is a rear view thereof;

FIG. 4 is a top view thereof;

FIG. 5 is a bottom view thereof;

FIG. 6 is a right-side view thereof, with a left-side view being a mirror image thereof; and,

FIG. 7 is a front, bottom and right-side perspective view thereof.

The broken lines depict portions of a toilet stool in which the design is embodied and form no part of the claimed design. 

CLAIM The ornamental design for a toilet stool, as shown and described. 